We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.
I am kind of confused about using the _at_ keyword to assign a specific address to a variable.
so for example :
extern xdata char variable _at_ 0x000f;
it fills 3 bytes in xram . can any one explain how is the compiler handling these sequence. Thank you !
Yes, but equally you know that I was not referring to __at__.
You were referring to a declaration that contains non-standard keywords, and basically by definition the standard cannot describe what the compiler should do with such a line.
Interestingly enough, the compiler documentation contains detailed examples on how to define variables using the _at_ keyword, and how to use these variables in a different source file than they were declared in.
You are missing the point. The issue in hand is that the 'extern' keyword, when applied to a variable definition, does not make it an "extern ref".
I should hope the manual documents the usage of all non-standard extensions.